Video sperm fertilizing egg human
Conception Pictures: From Egg to Embryo
Conception: From Egg to Embryo. Take a journey with us from the moment a single sperm fertilizes an egg. From tiny egg to growing embryo, follow the.
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Description:Fast-swimming sperm can reach the egg in a half an hour, while others may take days. But it usually takes 3 to 4 weeks for levels of hCG to be high enough to be detected by home pregnancy tests. The heart begins beating during week 5. This is called a tubal pregnancy or ectopic pregnancy and is a danger to the mother. The cells keep dividing. At the moment of fertilization, the baby's genetic makeup is complete, including whether it's a boy or girl. It leaves the fallopian tube and enters the uterus 3 to 4 days after fertilization.